Wojtek - JRP in Mississauga should sell that stuff but I think that it's expensive. You might also want to try Mantis Racing (a Porsche shop) in Oakville.
I think that the
www.casc.on.ca forums would be your best bet. Register and do a search - they've got lots of info on good stuff like the ATE. BTW, I just remembered that there might be a place called Northern Motorsports (sp?) that carries the stuff. Pete Mills on the CASC forums works there and can probably get it.